Oilpan: Remove GC_INFO_{DEFINE,DECLARE} macros

Source/modules/webmidi/MIDIPort.cpp

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 17 matching lines @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "config.h"
 #include "modules/webmidi/MIDIPort.h"
 
 #include "modules/webmidi/MIDIAccess.h"
 
 namespace WebCore {
 
-DEFINE_GC_INFO(MIDIPort);
-
 MIDIPort::MIDIPort(MIDIAccess* access, const String& id, const String& manufacturer, const String& name, MIDIPortTypeCode type, const String& version)
     : m_id(id)
     , m_manufacturer(manufacturer)
     , m_name(name)
     , m_type(type)
     , m_version(version)
     , m_access(access)
 {
     ASSERT(access);
     ASSERT(type == MIDIPortTypeInput || type == MIDIPortTypeOutput);
@@ skipping 17 matching lines @@
 {
     return m_access->executionContext();
 }
 
 void MIDIPort::trace(Visitor* visitor)
 {
     visitor->trace(m_access);
 }
 
 } // namespace WebCore